Henry Waxman

Henry Waxman

Chip Somodevilla / Getty Images

"Your decision appears to have ignored the evidence before the agency and the requirements of the Clean Air Act," Oversight and Government Reform Committee Chairman Henry Waxman says in the letter to the EPA.

"Your decision appears to have ignored the evidence before the agency and the requirements of the Clean Air Act," Oversight and Government Reform Committee Chairman Henry Waxman says in the letter to the EPA. (Chip Somodevilla / Getty Images)

"Your decision appears to have ignored the evidence before the agency and the requirements of the Clean Air Act," Oversight and Government Reform Committee Chairman Henry Waxman says in the letter to the EPA.